[ONOS-3479] Add the implementation of ArpService interface.

Change-Id: Icb473decddab711dc506b186dcf8d4543156a0ac

@@ -17,10 +17,13 @@ package org.onosproject.vtn.table;
 
 import org.onlab.packet.IpAddress;
 import org.onlab.packet.MacAddress;
+
 import org.onosproject.net.DeviceId;
+import org.onosproject.net.driver.DriverHandler;
 import org.onosproject.net.flowobjective.Objective;
 import org.onosproject.vtnrsc.SegmentationId;
 
+
 /**
  * ArpService interface providing the rules in ARP table which is Table(10).
  */
@@ -32,13 +35,14 @@ public interface ArpService {
      * Action: set arp_operation, move arp_eth_src to arp_eth_dst, set arp_eth_src,
      * move arp_ip_src to arp_ip_dst, set arp_ip_src, set output port.
      *
+     * @param hander DriverHandler
      * @param deviceId Device Id
      * @param dstIP destination ip
      * @param matchVni the vni of the source network (l2vni)
      * @param dstMac destination mac
      * @param type the operation type of the flow rules
      */
-    void programArpRules(DeviceId deviceId, IpAddress dstIP,
+    void programArpRules(DriverHandler hander, DeviceId deviceId, IpAddress dstIP,
                                 SegmentationId matchVni, MacAddress dstMac,
                                 Objective.Operation type);
 }

+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.vtn.table.impl;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static org.slf4j.LoggerFactory.getLogger;
+
+import org.onlab.osgi.DefaultServiceDirectory;
+import org.onlab.osgi.ServiceDirectory;
+import org.onlab.packet.EthType.EtherType;
+import org.onlab.packet.Ip4Address;
+import org.onlab.packet.IpAddress;
+import org.onlab.packet.MacAddress;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.PortNumber;
+import org.onosproject.net.behaviour.ExtensionTreatmentResolver;
+import org.onosproject.net.driver.DriverHandler;
+import org.onosproject.net.flow.DefaultTrafficSelector;
+import org.onosproject.net.flow.DefaultTrafficTreatment;
+import org.onosproject.net.flow.TrafficSelector;
+import org.onosproject.net.flow.TrafficTreatment;
+import org.onosproject.net.flow.instructions.ExtensionTreatment;
+import org.onosproject.net.flow.instructions.ExtensionTreatmentType;
+import org.onosproject.net.flowobjective.DefaultForwardingObjective;
+import org.onosproject.net.flowobjective.FlowObjectiveService;
+import org.onosproject.net.flowobjective.ForwardingObjective;
+import org.onosproject.net.flowobjective.ForwardingObjective.Flag;
+import org.onosproject.net.flowobjective.Objective;
+import org.onosproject.net.flowobjective.Objective.Operation;
+import org.onosproject.vtn.table.ArpService;
+import org.onosproject.vtnrsc.SegmentationId;
+import org.slf4j.Logger;
+
+/**
+ * ArpTable class providing the rules in ARP table.
+ */
+public class ArpServiceImpl implements ArpService {
+    private final Logger log = getLogger(getClass());
+
+    private static final int ARP_PRIORITY = 0xffff;
+    private static final short ARP_RESPONSE = 0x2;
+    private static final EtherType ARP_TYPE = EtherType.ARP;
+
+    private final FlowObjectiveService flowObjectiveService;
+    private final ApplicationId appId;
+
+    /**
+     * Construct a ArpServiceImpl object.
+     *
+     * @param appId the application id of vtn
+     */
+    public ArpServiceImpl(ApplicationId appId) {
+        this.appId = checkNotNull(appId, "ApplicationId can not be null");
+        ServiceDirectory serviceDirectory = new DefaultServiceDirectory();
+        this.flowObjectiveService = serviceDirectory.get(FlowObjectiveService.class);
+    }
+
+    @Override
+    public void programArpRules(DriverHandler hander, DeviceId deviceId,
+                                IpAddress dstIP, SegmentationId srcVni,
+                                     MacAddress dstMac, Operation type) {
+        TrafficSelector selector = DefaultTrafficSelector.builder()
+                .matchEthType(ARP_TYPE.ethType().toShort())
+                .matchArpTpa(Ip4Address.valueOf(dstIP.toString()))
+                .matchTunnelId(Long.parseLong(srcVni.segmentationId())).build();
+
+        ExtensionTreatmentResolver resolver = hander
+                .behaviour(ExtensionTreatmentResolver.class);
+        ExtensionTreatment ethSrcToDst = resolver
+                .getExtensionInstruction(ExtensionTreatmentType.ExtensionTreatmentTypes
+                                         .NICIRA_MOV_ETH_SRC_TO_DST.type());
+        ExtensionTreatment arpShaToTha = resolver
+                .getExtensionInstruction(ExtensionTreatmentType.ExtensionTreatmentTypes
+                                         .NICIRA_MOV_ARP_SHA_TO_THA.type());
+        ExtensionTreatment arpSpaToTpa = resolver
+                .getExtensionInstruction(ExtensionTreatmentType.ExtensionTreatmentTypes
+                                         .NICIRA_MOV_ARP_SPA_TO_TPA.type());
+        TrafficTreatment treatment = DefaultTrafficTreatment.builder()
+                .extension(ethSrcToDst, deviceId)
+                .setEthSrc(dstMac).setArpOp(ARP_RESPONSE)
+                .extension(arpShaToTha, deviceId)
+                .extension(arpSpaToTpa, deviceId)
+                .setArpSha(dstMac).setArpSpa(dstIP)
+                .setOutput(PortNumber.IN_PORT).build();
+
+        ForwardingObjective.Builder objective = DefaultForwardingObjective
+                .builder().withTreatment(treatment).withSelector(selector)
+                .fromApp(appId).withFlag(Flag.SPECIFIC)
+                .withPriority(ARP_PRIORITY);
+
+        if (type.equals(Objective.Operation.ADD)) {
+            log.debug("PrivateArpRules-->ADD");
+            flowObjectiveService.forward(deviceId, objective.add());
+        } else {
+            log.debug("PrivateArpRules-->REMOVE");
+            flowObjectiveService.forward(deviceId, objective.remove());
+        }
+    }
+}